Police chiefs said the weapons were a less lethal option than conventional guns in potentially dangerous situations.

"We always try to resolve situations involving armed people safely and without force and the arrival of the Taser in Staffordshire will not change that," said Assistant Chief Constable Suzette Davenport.

"If required, officers have a number of tactical options, including the use of CS spray, police dogs, baton rounds and actual firearms. Taser simply gives us one more less lethal option.

"The devices will not be used by all officers but only specialist firearms teams."

Staffordshire police are using a Taser model called the X26, delivering an electrical current that temporarily interferes with the body's neuromuscular system.

The shock is delivered through two barbs which are fired from the gun and attach to a suspect's skin or clothing.

Insp Michael Boyle, head of the Staffordshire force's firearms unit, said Taser guns were a "highly visible and psychological deterrent.

"Trials by other police forces have shown that even a suggestion the Taser might be used can bring dangerous situations to a swift and safe conclusion," Insp Boyle added.

"It is not a replacement for conventional police weapons which we still use if necessary."